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to present false information about oneself or to assume an identity other than one's own (after former Wikipedia employee Essjay)
Personal ads are a common medium in which people essjay.
by Essjay December 05, 2007
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(1) A hideous troll creature who preys on weak men.
(2) An insult used towards someone acting like a whore.
You are such and essjay" or "Don't be an essjay
by Running Refridgerator June 26, 2011
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